Object-C 学习笔记(十二)---Foundation之NSNumer

//
//  main.m
//  Foundation-NSNumber
//
//  Created by 5016 on 13-12-11.
//  Copyright (c) 2013年 dradon. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

@autoreleasepool {
//NSNumber类把基本数据类型包装成为类
//        - (char)charValue;
//        - (unsigned char)unsignedCharValue;
//        - (short)shortValue;
//        - (unsigned short)unsignedShortValue;
//        - (int)intValue;
//        - (unsigned int)unsignedIntValue;
//        - (long)longValue;
//        - (unsigned long)unsignedLongValue;
//        - (long long)longLongValue;
//        - (unsigned long long)unsignedLongLongValue;
//        - (float)floatValue;
//        - (double)doubleValue;
//        - (BOOL)boolValue;
//        - (NSInteger)integerValue NS_AVAILABLE(10_5, 2_0);
//        - (NSUInteger)unsignedIntegerValue NS_AVAILABLE(10_5, 2_0);
//创建一个NSNumber对象
NSNumber *mon = [NSNumber numberWithInt:12];
NSNumber *length = [NSNumber numberWithFloat:1.72];
NSLog(@"mon=%@ ; length = %@",mon,length);

//还原成为基本数据类型
//        - (char)charValue;
//        - (unsigned char)unsignedCharValue;
//        - (short)shortValue;
//        - (unsigned short)unsignedShortValue;
//        - (int)intValue;
//        - (unsigned int)unsignedIntValue;
//        - (long)longValue;
//        - (unsigned long)unsignedLongValue;
//        - (long long)longLongValue;
//        - (unsigned long long)unsignedLongLongValue;
//        - (float)floatValue;
//        - (double)doubleValue;
//        - (BOOL)boolValue;
//        - (NSInteger)integerValue NS_AVAILABLE(10_5, 2_0);
//        - (NSUInteger)unsignedIntegerValue NS_AVAILABLE(10_5, 2_0);
//        - (NSString *)stringValue;

int month = [mon intValue];
float len = [length floatValue];
NSLog(@"mon=%d ; length = %f",month,len);

}
return 0;
}